x^2 + y^2 = 10
take the partial derivative
2x + 2y dy/dx =0
subtract 2x from each side
2y dy/dx = -2x
divide by 2y
dy/dx = -2x /2y
dy/dx = -x/y
Using law of cosines:
Cos(angle) = adjacent/ hypotenuse
Cos(22) = 12/x
Rewrite to get:
X = 12/cos(22)
Simplify:
X = 12.9424
Round the answer as needed.
Answer:
16?? not sure.......
